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Merged in antmerlino/nuttx/stm32f7-sdmmc-bypclk (pull request #844)

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arch/stm32f7: Support bypassing the input clock divider on the SDMMC interface. This enables using the full clock speed provided to the SDMMC interface with no dividing.

Approved-by: Gregory Nutt <gnutt@nuttx.org>
This commit is contained in:
Anthony Merlino 2019-04-03 19:36:21 +00:00 committed by Gregory Nutt
parent 0725be9773
commit 370dc27c60
1 changed files with 16 additions and 6 deletions
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22
arch/arm/src/stm32f7/stm32_sdmmc.c
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@ -184,12 +184,22 @@
#define STM32_SDMMC_CLKCR_MMCXFR (STM32_SDMMC_MMCXFR_CLKDIV | \
STM32_SDMMC_CLKCR_EDGE | \
STM32_SDMMC_CLKCR_WIDBUS_D1)
#define STM32_SDMMC_CLCKR_SDXFR (STM32_SDMMC_SDXFR_CLKDIV | \
STM32_SDMMC_CLKCR_EDGE | \
STM32_SDMMC_CLKCR_WIDBUS_D1)
#define STM32_SDMMC_CLCKR_SDWIDEXFR (STM32_SDMMC_SDXFR_CLKDIV | \
STM32_SDMMC_CLKCR_EDGE | \
STM32_SDMMC_CLKCR_WIDBUS_D4)
#ifdef STM32_SDMMC_SDXFR_BYPCLKDIV
# define STM32_SDMMC_CLCKR_SDXFR (STM32_SDMMC_CLKCR_BYPASS | \
STM32_SDMMC_CLKCR_EDGE | \
STM32_SDMMC_CLKCR_WIDBUS_D1)
# define STM32_SDMMC_CLCKR_SDWIDEXFR (STM32_SDMMC_CLKCR_BYPASS | \
STM32_SDMMC_CLKCR_EDGE | \
STM32_SDMMC_CLKCR_WIDBUS_D4)
#else
# define STM32_SDMMC_CLCKR_SDXFR (STM32_SDMMC_SDXFR_CLKDIV | \
STM32_SDMMC_CLKCR_EDGE | \
STM32_SDMMC_CLKCR_WIDBUS_D1)
# define STM32_SDMMC_CLCKR_SDWIDEXFR (STM32_SDMMC_SDXFR_CLKDIV | \
STM32_SDMMC_CLKCR_EDGE | \
STM32_SDMMC_CLKCR_WIDBUS_D4)
#endif
/* Timing */